Journal of Korean Society of Occupational and Environmental Hygiene (한국산업보건학회지)

Korean Industrial Hygiene Association (한국산업보건학회)
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Comparison of Airborne Nanoparticle Concentrations between Carbon Nanotubes Growth Laboratories based on Containment of CVD

탄소나노튜브 성장 실험실에서 CVD 밀폐 여부에 따른 공기 중 나노입자 농도 비교

  • Ha, Ju-Hyun (Department of Occupational Health and Safety Engineering, Inje University) ;
  • Shin, Yong-Chul (Department of Occupational Health and Safety Engineering, Inje University)
  • 하주현 (인제대학교 보건안전공학과) ;
  • 신용철 (인제대학교 보건안전공학과)
  • Received : 2010.09.03
  • Accepted : 2010.09.17
  • Published : 2010.09.30
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Abstract

Although the usage of nanomaterials including carbon nanotubes (CNTs) has increased in various fields, scientific researches on workers' exposures and controls of these materials are very limited. The purpose of this study was to compare the airborne nanoparticles concentrations from two university laboratories conducting experiments of CNTs growth based on containment of thermal chemical vapor deposition (CVD). Airborne nanoparticle concentrations in three metrics (surface area concentration, particle number concentration, and mass concentrations) were measured by task using three direct reading instruments. In a laboratory where CVD was not contained, the surface area concentration, number concentration and mass(PM$_1$) concentration of airborne nanoparticles were 1.5 to 3.5 times higher than those in the other laboratory where CVD was confined. The ratio of PM$_1$ concentration to total suspended particles(TSP) in the laboratory where CVD was not confined was about 4 times higher than that in the other laboratory. This indicates that CVD is a major source of airbone nanoparticles in the CNTs growth laboratories. In conclusion, researchers performing CNTs growth experiments in these laboratories were exposed to airborne nanoparticles levels higher than background levels, and their exposures in a laboratory with the unconfined CVD were higher than those in the other laboratory with the confined CVD. It is recommended that in the CNTs growth laboratories adequate controls including containment of CVD be implemented for minimizing researchers' exposures to airborne nanoparticles.

Keywords

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